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[3.10] bpo-46655: allow stringized TypeAlias with get_type_hints (GH-31156). (#31175)

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(cherry picked from commit 77b025be4a)

Co-authored-by: Gregory Beauregard <greg@greg.red>
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Gregory Beauregard 2022-02-07 08:21:56 -08:00 • committed by GitHub
parent c1ff4cb98b
commit e2eeffefed
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3 changed files with 7 additions and 1 deletions
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5
Lib/test/test_typing.py
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@ -4768,6 +4768,11 @@ class TypeAliasTests(BaseTestCase):
with self.assertRaises(TypeError):
isinstance(42, TypeAlias)
def test_stringized_usage(self):
class A:
a: "TypeAlias"
self.assertEqual(get_type_hints(A), {'a': TypeAlias})
def test_no_issubclass(self):
with self.assertRaises(TypeError):
issubclass(Employee, TypeAlias)